Why would this document have such detailed information on options, colors, dealer, dates, etc.. but not include the VIN? Is there some other means of positive association (to a specific car) other than the VIN?

Does the Camaro Body Broadcast Copy (as used at Van Nuys production) include the car's VIN?

The Corvette Order Copy (tank sticker) was printed about three days before the car was built, and Corvettes didn't get their VIN until they left the Paint Shop, so prior to '71 the VIN wasn't known at the time the paperwork stack was computer line-printed (which is why the last six digits of the VIN was hand-stamped on the window sticker). The positive means of association between the Corvette tank sticker and its VIN is another number on the tank sticker, and only the NCRS has that data, which they use for their "Document Validation Service".